Question

x+4.2=5.8解方程方程要完整

Answer 1

解：等式两边同减4.2，得
x=5.8－4.2
∴x=1.6

Answer 2

x+4.2=5.8 x=5.8-4.2 x=1.6

Answer 3

Answer 4

解:x=5.8-4.2
x=1.6

Answer 5

解:
x=5.8-4.2
x=1.6